The Shimano GRX ST-RX815 11-speed Di2 shift/brake lever integrates electronic shifting with improved grip and confidence on chippy surfaces and descents

If the rear derailleur cable is routed internally through the chainstay and exits at the end of the chainstay above the axle or past the axle out the very end

6061-T6 Forged Aluminum construction

and even easier to use thanks to the machined aircraft grade 7075 aluminum and Muc-Off’s new Tire Insert air flow system

mirror and coffee cup holder

Shimano SLX CS-M7000 11-Speed Cassette 11-40T Silver/Black closeout The Shimano GRX ST-RX815 11-speedPerfect for 1x and 2x MTB drivetrains, SHIMANO's M7000 11cassette offers Rider Tuned gear steps for maximum cadence control across the varied terrain of mountain biking. High efficiency drivetrain for aggressive trail riding Smooth and stable shifting Wider range and smooth gear steps for 1x11 system Lightweight spider construction